package thread.atguigu04.threadsafemore.lock;

import java.util.concurrent.locks.ReentrantLock;

/**
 * @author Jack Tang
 * @description
 * @create 2023-08-19 17:06
 */

class Window extends Thread{
    static int ticket = 100;

    //1.创建Lock的实例，需要确保多个线程共用同一个Lock实例!需要考虑将此对象声明为static final
    private static final ReentrantLock lock = new ReentrantLock();

    @Override
    public void run() {
        while (true) {
            try {
                //2.执行lock()方法，锁定对共享资源的调用
                lock.lock();
                if (ticket > 0){

                    try {
                        Thread.sleep(100);
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }

                    System.out.println(Thread.currentThread().getName() + "售票，票号为：" + ticket);
                    ticket--;
                }else {
                    break;
                }
            } finally {
                //3.unlock()的调用，释放对共享数据的锁定
                lock.unlock();
            }
        }
    }
}

public class LockTest {
    public static void main(String[] args) {
        Window w1 = new Window();
        Window w2 = new Window();
        Window w3 = new Window();

        w1.setName("窗口1");
        w2.setName("窗口2");
        w3.setName("窗口3");

        w1.start();
        w2.start();
        w3.start();

    }
}